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run-command API users: use strvec_pushl(), not argv construction

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Change a pattern of hardcoding an "argv" array size, populating it and
assigning to the "argv" member of "struct child_process" to instead
use "strvec_pushl()" to add data to the "args" member.

This implements the same behavior as before in fewer lines of code,
and moves us further towards being able to remove the "argv" member in
a subsequent commit.

Since we've entirely removed the "argv" variable(s) we can be sure
that no potential logic errors of the type discussed in a preceding
commit are being introduced here, i.e. ones where the local "argv" was
being modified after the assignment to "struct child_process"'s
"argv".

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason
2021-11-25 23:52:20 +01:00
committed by Junio C Hamano
parent 87ee87dd6b
commit 2b7098936c
10 changed files with 29 additions and 61 deletions
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3
builtin/help.c
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@@ -212,11 +212,10 @@ static int check_emacsclient_version(void)
{
struct strbuf buffer = STRBUF_INIT;
struct child_process ec_process = CHILD_PROCESS_INIT;
const char *argv_ec[] = { "emacsclient", "--version", NULL };
int version;
/* emacsclient prints its version number on stderr */
ec_process.argv = argv_ec;
strvec_pushl(&ec_process.args, "emacsclient", "--version", NULL);
ec_process.err = -1;
ec_process.stdout_to_stderr = 1;
if (start_command(&ec_process))